from flask import current_app, jsonify
from flask import g
from flask import render_template
from flask import request
from flask import session

from info import constants
from info.models import User, News, Category
from info.utils.common import user_login_data
from info.utils.response_code import RET

from . import index_blu


# 渲染主页模板
@index_blu.route('/')
@user_login_data
def index():
    # # 获取到当前登陆用户的id
    # user_id = session.get("user_id")
    # # 通过id获取用户信息
    # user = None
    # if user_id:
    #     try:
    #         user = User.query.get(user_id)
    #     except Exception as e:
    #         current_app.logger.error(e)

    # 获取点击排行榜
    news_list = None
    try:
        news_list = News.query.order_by(News.clicks.desc()).limit(constants.CLICK_RANK_MAX_NEWS)
    except Exception as e:
        current_app.logger.error(e)

    click_news_list = []
    for news in news_list if news_list else []:
        click_news_list.append(news.to_basic_dict())

    # 获取新闻分类数据
    categories = Category.query.all()
    # 定义列表保存分类数据
    categories_dicts = []

    for category in enumerate(categories):
        # 拼接内容
        categories_dicts.append(category[1].to_dict())

    data = {
        "user_info": g.user.to_dict() if g.user else None,
        "click_news_list": click_news_list,
        "categories": categories_dicts
    }

    return render_template("news1/index.html", data=data)


@index_blu.route("/newslist")
def get_news_list():
    """
    获取指定分类的新闻列表
    1.获取参数
    2.校验参数
    3.查询数据
    4.返回数据
    :return:
    """
    # 1.获取参数
    args_dict = request.args
    page = args_dict.get("page", "1")
    per_page = args_dict.get("per_page", constants.HOME_PAGE_MAX_NEWS)
    category_id = args_dict.get("cid", "1")

    # 2.校验参数
    try:
        page = int(page)
        per_page = int(per_page)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    # 3.查询数据并分页
    filter = [News.status == 0]
    # 如果分类id不为1,那么添加分类id的过滤
    if category_id != "1":
        filter.append(News.category_id == category_id)
    try:
        paginate = News.query.filter(*filter).order_by(News.create_time.desc()).paginate(page, per_page, False)
        # 获取查询出来的数据
        items = paginate.items
        # 获取到总页数
        total_page = paginate.pages
        # 当前页
        current_page = paginate.page
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="查询数据失败")
    # 将模型列表转成字典列表
    news_li = []
    for news in items:
        news_li.append(news.to_basic_dict())
    # 4.返回数据
    return jsonify(errno=RET.OK, errmsg="OK", total_page=total_page, current_page=current_page, newsList=news_li,
                   cid=category_id)


# 网站图标展示
@index_blu.route('/favicon.ico')
def favicon():
    return current_app.send_static_file('news/favicon.ico')
